ANSWERS: 4
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It's the discovery of one's self
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Surely the wheel..?
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The wheel, fire! Scientific I would say penicillin, small pox vaccination
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Man's ability to harness the energy produced by fire is the most important scientific achievement because it opened to door to many future scientific discoveries. For example: Metallurgy allowed humans to make advances in weaponry, agriculture, and art. Metallurgy was not possible without the use of furnaces fueled by fire.
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